A courtesan was originally a courtier, which means a person who attends the court of a monarch or other powerful person.In feudal society, the court was the centre of government as well as the residence of the monarch, and social and political life were often completely mixed together. Prior to the Renaissance, courtesans served to convey information untrusted to servants to visiting dignitaries. In Renaissance Europe, courtiers played an extremely important role in upper-class society.